Take-up motion regulation device for looms



Aug. 3, 1%37. 1 H. REKFENBERG 2,535,759

- TAKE-Ht MOTION REGULATION DEVICE FOR LOOMS Filed April 14, 1936Patented Aug. 3, 1937 PATENT 'OFFICE TAKE-UP MOTION REGULATION DEVICE-FOR LOOMS Hans Reifenberg, Viersen, Germany Application April 14, 1936,Serial No. 74,252 In Great Britain March 17, 1936 1 Claim.

This invention relates to power looms of the kind comprising acam-operated lever system operative to change periodically at a variableratio the speed of the take-up motion in order 5 to vary the weftdensity in repeat patterning, and the invention consists in thecombination with a cam driven in known manner by means of a train ofexchangeable gears, of a pair of double-armed levers interconnected by alink 10 which is adjustable in length, one of said levers beingspring-controlled and adapted to co-operate with the drive of thetake-up motion for regulating the speed thereof, and the other leverbeing supported on the cam by means of a thrust 15 member in the form ofan arm which is adjustable along a slot in the lever for varying thethrow of the levers.

The mechanism obtained in this manner is very simple and allows asatisfactory regulation 2 of the patterning as well as of the strokes ofthe levers.

For this purpose a lever by means of which the speed of the take-upmotion is regulated is adapted to be rocked by a cam which receives 25rotary motion at a variable ratio from a driving shaft.

Figs. 1 and 2 of the accompanying drawing represent views at rightangles to each other and partly in section of a device constructed ac-30 cording to the invention.

The loom is provided with a lever M which is rocked about a fulcrum 13for regulating the speed of the take-up motion and thus the density ofthe weft. In order to vary this density 35 periodically in repeatpatterning, the regulating lever 14 is according to the inventioncontrolled by a cam 6 which imparts a periodic rocking motion to thelever. The cam 6 acts on an auxiliary lever Ill which is pivoted at 9 toa rigid support and which is connected to the lever M by means of a link12, the latter being adjustable in length by means of a screw couplingl6 for regulating the average speed of the take-up motion. An arm 8 isarranged as a thrust member between'the cam and the auxiliary lever Ill.The connecting point of the arm with the lever Iii can be regulated forvarying the throw of the lever I l. The connecting screw of the arm isfor this purpose adjustable along a slot II in the lever. The arm 8bears againstthe cam G by means of a roller 1. A spring I5, which actson the lever l4, controls the lever system and maintains the roller 1 incontact with the cam.

The shaft 5 on which the cam 6 is mounted also carries a gear wheel 4 bymeans of which rotary motion is transmitted to the cam. A driving shaftl in the loom is fitted with a pinion 2 which transmits the motion tothe wheel 4 by means of a train of speed-reducing gears 3, the Wheels ofthe latter being exchangeable for varying the transmission ratio.

I claim:

In a take-up motion for looms, the combination of a spring-controlledrocking lever for regulating the speed of said motion, an auxiliarylever, a link of variable length connecting the two levers, a rotaryearn, a driving shaft, a train of gears for transmitting motion at avariable ratio from the shaft to the cam, and an arm connected to theauxiliary lever and bearing against said cam for imparting rockingmotion to the levers, said arm being adjustable along the auxiliarylever for varying the stroke of the levers.

HANS REIFENBERG.

